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Finding the Fourth Proportional to 128,042.97, 176,709.08 and 70,693.35

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Solution

The fourth proportional to 128,042.97, 176,709.08 and 70,693.35 is: 97,562.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,042.97 : 176,709.08 = 70,693.35 : x
  2. Step 2: Convert to fraction form
    128,042.97/176,709.08 = 70,693.35/x
  3. Step 3: Cross multiply
    128,042.97x = 176,709.08 × 70,693.35
  4. Step 4: Simplify right side
    128,042.97x = 12,492,156,840.62
  5. Step 5: Solve for x
    x = 12,492,156,840.62/128,042.97
  6. Step 6: Final answer
    x = 97,562.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.